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Chem 1 Chapter 4&5
Terms in this set (29)
Substance X is a molecular compound and is not an acid nor a base. Based just on this information, what can you determine about substance X?
a. X is soluble in water.
b. X is insoluble in water.
c. X is an electrolyte.
d. X is not an electrolyte.
d. X is not an electrolyte
Which of the following would you least expect to find in CaCl2(aq)?
a. H2O molecules
b. CaCl2 molecules
c. Ca2+ ions
d. Cl− ions
b. CaCl2 molecules
What is the net ionic equation of the reaction of ZnCl2 with NaOH?
Zn(aq)+2OH(aq) → Zn(OH)2(s)
Suppose that aqueous solutions of barium nitrate and potassium carbonate are mixed. What is the name of the compound or compounds that precipitate?
Barium Nitrate plus Potassium Carbonate = Barium Carbonate plus Potassium Nitrate. Barium Carbonate is insoluble in water and is the precipitate.
energy an object possesses by virtue of its motion
energy an object possesses by virtue of its position or chemical composition
energy resulting from interaction of charged particles
energy stored in structure of substances
the SI unit of energy
includes the molecules we want to study
mol of solute ÷ volume of total solution L
Oxidation Is Loss Reduction Is Gain
First Law of Thermodynamics
energy is neither created nor destroyed
When a system loses energy, it is
When a system absorbes energy, it is
system can reduce internal energy by
1. doing work on surroundings
2. losing heat to surroundings
system can gain internal energy by
1. surroundings doing work on the system
2. absorbing heat from surroundings
when heat is absorbed by the system from the surroundings, the process is
the internal energy of a system is independent of
the path by which the system achieved that state
Are work, heat, and internal energy state functions?
work and heat are not, internal energy is
a process is endothermic when
∆H is positive
a process is exothermic when
∆H is negative
heat of fusion
the amount of heat required to melt a solid
heat of vaporization
the amount of heat required to vaporize a liquid into a gas
heat of sublimation
the amount of heat required to vaporize a solid into a gas
specific heat capacity
the amount of heat required to raise the temperature of 1g of a substance to 1 deg C
the enthalpy change for the reaction in which a compound is made from its constituent elements in their elemental forms
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